Cloning into '/var/folders/fp/3wvbbc4n2xxf1dt9bfpqtdd00000gn/T/git/1495587849906'...

fatal: Unable to find remote helper for 'git+https'

My question is: why is it transforming the URL from https to git+https and how can I keep it from doing that? I use another plugin with a github spec and it gets cloned properly, using just https (it doesn't have any variables... basically the only difference).